THE THING! (Who Goes There?) John W. Campbell

Who Goes There? is a 1938 science fiction horror novella by John W. Campbell, following a group trapped in a scientific outpost in Antarctica infested by shapeshifting monsters.  Who Goes There? was first published in the August 1938 issue of Astounding Science Fiction magazine and was also printed as The Thing from Another World. Its extended, novel version, found in an early manuscript titled Frozen Hell, was finally published in 2019.